Grinding wheel and a method for cooling the same



July 25, 1939. D. 2. MURPHY 2,167,282

GRINDING WHEEL AND A METHOD FOR COOLING THE SAME I Filed April 16, 1938 2 Sheets-Sheet 1 W III Av &

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BY .aq

- ATTO EY D. Z. MURPHY.

Jul 25, 1 939.

GRINDING WHEEL AND A METHOD FOR COOLING THE SAME Filed April 16, 1938 2 Sheets-Sheet 2 INVENTQR ma Z. Illu P Patented July 25, 1939 PATENT OFFICE- GRINDING WHEEL AND A METHOD FOR COOLING THE SAME David Z. Murphy, Portland, Oreg.

Application April 16,

4 Claims.

My invention relates to grinding and polishing wheels and particularly' to wheels of the abrasive type wherein a cooling fluid-is to be applied to the grinding surface of the grinding wheel to prevent overheating of the article being ground and to aid in the grinding and cutting eifect of the wheel.

Heretofore it has been customary to either dip the article intermittently within water or to run the wheel in water or to apply the cooling fluid in .a stream to the surface of the wheel.

In my new and improved deviceI apply the cooling fluid through the arbor or shaft upon which the wheel is mounted and the cooling fluid flows from arbor through the wheel and out at the grinding surface. This increases the efficiency of the wheel both in its cutting operation and in the character and quality of the grind being appliedto the surface and also lessens the necessity of applying the cooling fluid in any other manner to the wheel.

I accomplish this result by mounting the wheel upon the arbor or shaft or upon the hub of the collar that is mounted upon the arbor and cut a groove in the arbor or in the hub and deliver the cooling fluid centrally through the arbor and to the internal bore or rim of the wheel; with the cooling fluid flowing outward through the wheel and to the rim of the wheel to thereby automatically and continuously supply the cooling fluid to the surface of the wheel as the wheel is rotated.

One of the objects of my invention is to provide simple means, automatic in its operation, in applying a cooling fluid to the cutting surface of abrasive wheels.

A further object of my invention is to so apply the cooling fluid to the surface of a grinding wheel so that the overheating of the article being ground is eliminated and the clogging or filling of the bores of the grinding wheel with the ground metal becoming integrated within the grinding surface of the wheel is prevented.

A still further object of my invention is to supply a cooling fluid to the wheel so that it may be supplied in any quantity desired to give the most efficient and satisfactory results.

With these and incidental objects in view, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims, and a preferred form of embodiment of which is hereinafter shown with reference to the drawings which accompany and form a part of this specification.

1938, Serial No. 202,495

In the drawings: Fig. I is a sectional vertical view taken through a pair of grinding wheels mounted upon a com-- mon arbor and to which a cooling fluid is independently admitted to the opposite ends of the arbor and for being fed directly to the grinding wheel mounted thereupon.

Fig. II is a side view of the mechanism illustrated in Fig. I.

Fig. III is a fragmentary sectional side view of an arbor and a cross section view through the grinding wheel mounted thereupon. This view is made to illustrate a cut out sleeve adapted for being mounted upon the arbor and for accommodating the cooling fluid to wheels of various thicknesses that are to be mounted upon the arbor and the sleeve associated therewith.

Fig. IV is an end view of a housing for a grinding wheel equipped with a hollow spindle for passing a fluid through the wheel when being used. In this view an adjustable transparent shell is disposed adjacent the front.

Like reference characters refer to like parts throughout the several views.

I have here shown my device as being mounted upon the frame I of a grinding stand. An arbor 2 is Journaled within the stand and the driving shrouded pulley 3 is disposed centrally of the shaft and mounted within the frame. 3 is driven by any suitable means as through the use of a V-belt 4.

In Figs. I and II, I have shown a pair of grinding wheels 5 and 6 with one of each of the The pulley wheels being mounted upon the arbor 2 adjacent its opposite ends. Housings I and .8 are secured to the stand I and act as a protector and shroud for the respective wheels.

Enclosure plates 9 and I0 are also provided to further enclose the wheel and to protect the same fromdamaging the grinding operator.

The arbor is threaded upon the outer surface adjacent its ends as illustrated at II and I2, and suitable clamping nuts l3 and M are provided for clamping the respective wheels on the arbor.

I bore the arbor at its ends with the center of the bore being coaxial with that of the arbor as illustrated at l5 and I6 and stuffing glands I1 and I8 are provided and the same are maintained tight relative to the arbor and relative to the feed pipe by gland nuts I!) and 20. Feed pipes 2| and 22 pass through the gland nuts and into the respective ends of the arbor.

The feed pipes 2| and 22 may be formed integral with the closures 9 and ID or they may be made independently thereof. Shut-off valves 23 and 24 are associated with the pipe for regulating and predetermining the amount of cooling fluid that is to be admitted through the feed pipes into and centrally oi the arbor. A cooling fluid under pressure is delivered into the feed tube through the valves by tubes 25 and 26 that lead to a source of cooling fluid not here shown.

The cooling fluid flows from the bored portion of the arbor as illustrated at l and I8 outward through a plurality of spaced feeder holes 21 that deliver the cooling fluid to that portion of the wheel that rests directly upon the arbor upon any suitable hubs 28 and 29 that may be mounted directly upon the arbor and upon which the abrasive wheels are directly mounted. The cooling fluid flows outwardly through the wheel and emerges upon the surface of the wheel.

The amount of fluid being delivered to the surface of the wheel will depend upon the amount of flow predetermined by the valves and the pressure that is being supplied under and the velocity of the wheel. This means of supplying a cooling medium to the abrasive wheel may also be used in supplying a cutting compound to felt wheels or polishing wheels with equal facility and with equally satisfactory results.

In Fig. III, I have shown the arbor 30 as having a fixed collar 3| associated therewith against which the wheel rests upon one of its sides. A collar 33 has a sleeve 34 formed integral therewith and the collar 33 is in threadable relationship with the threaded end 35 of the arbor.

The grinding wheel 32 is bored as illustrated at 36 and the shoulder 31 of the arbor supports a ring 38 thereupon and the sleeve 84 of the collar 33 has a like sleeve 39 disposed thereupon. The collar 33 is threaded as illustrated at 40, but no portion of the sleeve 34 is threaded and a plurality of ports M communicate the bored portion M of the arbor with the space id-disposed between the respective rings 38 and 39 so that if a wheel of different width is to be disposed upon the arbor a sufllcient number of the ports M may be closed to limit the feeding of the desired amount of cooling fluid to the wheel; or if the wheel is to be run dry, the sleeve of the diameter of the sleeve 34 may be placed on the arbor to thereby close all of the ports 6|. While but one width of wheel is shown in Fig. III, wheels of the desired width may be placed upon the arbor and may be clamped thereupon by the turning action of the collar 33 and clamped on the arbor in the usual manner. The amount of cooling fluid to be admitted into the bored portion of the wheel and into the space 36 is limited by the position of the sleeve 34 and the collar 33 associated therewith.

In Fig. IV, I have illustrated a housing comprised of like end plates it that are secured to the frame of the grinding wheel by any suitable fastening means as through the use of screws 65. The front 46 of the housing is spaced apart sufflciently from the wheel 5'! to catch fluid or grindings leaving the wheel or the article being ground.

A hood 49 is also provided and a transparent shield 50 is disposed at the front and spaced apart from the grinding wheel 67 in order that the hand or hands of the party using the wheel may pass around the ends over the transparent shield 50 and support the article being ground between the transparent shield 50 and the bracket 68 and the wheel 61. The transparent shield 50 is supported about any suitable adjustable support 5| in order that the shield may be tilted as required and the same may be made of a length greater than that to pass underneath the hood 43, or it may be made to pass beneath the hood 49 as illustrated in dotted position 50.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the embodiment herein shown and described, as it is susceptible of embodiment in various forms all coming within the scope oi the claims which follow.

What I claim is:

1. In a device of the class described, the com-- bination of a stand and an arbor journaled within the stand, abrasive wheels disposed upon the arbor, said arbor being bored coaxially with its center line at its ends, a feeder pipe disposed within the bored end of the arbor, a stuffing box disposed about the pipe and secured to the end of the arbor, a collar fitted to the arbor and adjustable longitudinally of the arbor and adapted for supporting wheels of different widths, and ports communicating the bore of the abrasive wheel with the bore of the arbor, and said collar adapted for closing predetermined ones of said ports.

2. In a device of the class described, in combination of a grinding wheel, a spindle therefor having means for feeding grinding fluid through the spindle into the eye of the wheel, comprising a frame, a housing for said frame disposed at either side of the grinding wheel, spaced ring supports for said wheel with the spacing of the rings providing a recess in the eye of the grinding wheel, a plurality of ports communicating through the walls of the spindle and said ports being spaced around the spindle and along the spindle, and a collar slldable along the arbor and adapted for closing predetermined ones of the ports.

3. In a device of the class described, the combination of an arbor, said arbor being bored coaxially and at either end, a plurality of ports communicating with the bore of the arbor through the wall of the arbor, said ports extending around the arbor and along the arbor, a grinding wheel, said grinding wheel having an eye disposed centrally thereof, a plurality of rings disposed within the eye to fit the eye to the arbor, with said rings being spaced apart to form a recess within the eye between the rings and a collar fitted to the arbor and movable longitudinally of the arbor and the second collar having a shoulder disposed thereupon for supporting the other side of the wheel, means for clamping the wheel between the arbor and means for closing off certain ones of the ports to accommodate wheels of difierent widths as the collar is moved along.

4. In a device of the class described, the combination of an arbor, journaled supports for said arbor, said arbor being bored coaxially and longitudinally of its end, a plurality of ports communicating the bore of the arbor through the wall of the arbor, said ports being spaced around the arbor and longitudinally of the arbor, a pair of collars disposed upon the arbor, one of said collars being fixed and the other one of said collars being movable to adapt the same for clamping grinding wheels therebetween of different widths and the movable collar being fitted to the arbor as to close certain of the ports as the collar is moved longitudinally of the arbor.

DAVID Z. MURPHY. 

